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Poster: SuteerthVajpeyi Date: May 15, 2022 1:42am
Forum: texts Subject: Downloading books with yellowed pages leads to a document having blank pages without text.

Whever I download a book with yellowed pages from this website in pdf format, the downloaded document shows blank pages with a yellow (or gray if I have downloaded in black and white pdf format) back ground with the text missing. This issue does not occur with books with white pages. Also on reading books with yellow pages online the text is visible. The problem only occurs when I try to download the open access book in question.Please tell me the cause of this problem and how to fix it.

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Poster: Jeff Kaplan Date: May 15, 2022 4:33pm
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

please post a link to an example.

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Poster: SuteerthVajpeyi Date: May 16, 2022 12:19am
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

Here is a link for example : https://archive.org/details/thenatureofmath00jouruoft/mode/2up

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Poster: Jeff Kaplan Date: May 16, 2022 6:36pm
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

it looks fine for me. screenshot attached.

try right-clicking on the pdf link and select "Save link as..." to download the pdf.

Attachment: Screen_Shot_2022-05-16_at_6.36.17_PM.png

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Poster: SuteerthVajpeyi Date: May 17, 2022 4:08am
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

Well I tend to read books on my phone so I cannot 'right click' the pdf link. I would really be grateful to you if you could suggest a solution that works for my phone. Attached is a snapshot of the book as it appears before me on my phone.

Attachment: Screenshot_20220517-164119_Drive.jpg

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Poster: Albretch Date: May 18, 2022 8:09pm
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

last time I checked I didn't have any kind of Daltonism. That page, however, didn't look fine to me it had a yellowish background to it. I am curious about the origin of those background artifacts at which point of the scanning or ocring does it happen?
unpaper:
https://github.com/Flameeyes/unpaper
is highly amenable to scripting:
https://www.auditeon.com/software:unpaper_test

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Poster: SuteerthVajpeyi Date: May 25, 2022 3:56am
Forum: texts Subject: Re: Downloading books with yellowed pages leads to a document having blank pages without text.

I finally found out the problem. It is the default pdf viewer on my phone that is defective. I changed to a different pdf viewer and the problem resolved. Thank you for taking out the time to help me.